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//===-- InputReader.h -------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef liblldb_InputReader_h_
#define liblldb_InputReader_h_
#include <string.h>
#include "lldb/lldb-public.h"
#include "lldb/lldb-enumerations.h"
#include "lldb/Core/Error.h"
#include "lldb/Core/StringList.h"
#include "lldb/Host/Predicate.h"
namespace lldb_private {
class InputReader
{
public:
typedef size_t (*Callback) (void *baton,
InputReader &reader,
lldb::InputReaderAction notification,
const char *bytes,
size_t bytes_len);
struct HandlerData
{
InputReader& reader;
const char *bytes;
size_t bytes_len;
void* baton;
HandlerData(InputReader& r,
const char* b,
size_t l,
void* t) :
reader(r),
bytes(b),
bytes_len(l),
baton(t)
{
}
lldb::StreamSP
GetOutStream();
bool
GetBatchMode();
};
struct InitializationParameters
{
private:
void* m_baton;
lldb::InputReaderGranularity m_token_size;
char* m_end_token;
char* m_prompt;
bool m_echo;
bool m_save_user_input;
public:
InitializationParameters() :
m_baton(NULL),
m_token_size(lldb::eInputReaderGranularityLine),
m_echo(true),
m_save_user_input(false)
{
SetEndToken("DONE");
SetPrompt("> ");
}
InitializationParameters&
SetEcho(bool e)
{
m_echo = e;
return *this;
}
InitializationParameters&
SetSaveUserInput(bool s)
{
m_save_user_input = s;
return *this;
}
InitializationParameters&
SetBaton(void* b)
{
m_baton = b;
return *this;
}
InitializationParameters&
SetGranularity(lldb::InputReaderGranularity g)
{
m_token_size = g;
return *this;
}
InitializationParameters&
SetEndToken(const char* e)
{
m_end_token = new char[strlen(e)+1];
::strcpy(m_end_token,e);
return *this;
}
InitializationParameters&
SetPrompt(const char* p)
{
m_prompt = new char[strlen(p)+1];
::strcpy(m_prompt,p);
return *this;
}
friend class InputReaderEZ;
};
InputReader (Debugger &debugger);
virtual
~InputReader ();
virtual Error
Initialize (Callback callback,
void *baton,
lldb::InputReaderGranularity token_size,
const char *end_token,
const char *prompt,
bool echo);
virtual Error Initialize(void* baton,
lldb::InputReaderGranularity token_size = lldb::eInputReaderGranularityLine,
const char* end_token = "DONE",
const char *prompt = "> ",
bool echo = true)
{
return Error("unimplemented");
}
virtual Error
Initialize(InitializationParameters& params)
{
return Error("unimplemented");
}
// to use these handlers instead of the Callback function, you must subclass
// InputReaderEZ, and redefine the handlers for the events you care about
virtual void
ActivateHandler(HandlerData&) {}
virtual void
DeactivateHandler(HandlerData&) {}
virtual void
ReactivateHandler(HandlerData&) {}
virtual void
AsynchronousOutputWrittenHandler(HandlerData&) {}
virtual void
GotTokenHandler(HandlerData&) {}
virtual void
InterruptHandler(HandlerData&) {}
virtual void
EOFHandler(HandlerData&) {}
virtual void
DoneHandler(HandlerData&) {}
bool
IsDone () const
{
return m_done;
}
void
SetIsDone (bool b)
{
m_done = b;
}
lldb::InputReaderGranularity
GetGranularity () const
{
return m_granularity;
}
bool
GetEcho () const
{
return m_echo;
}
StringList&
GetUserInput()
{
return m_user_input;
}
virtual bool
GetSaveUserInput()
{
return false;
}
// Subclasses _can_ override this function to get input as it comes in
// without any granularity
virtual size_t
HandleRawBytes (const char *bytes, size_t bytes_len);
Debugger &
GetDebugger()
{
return m_debugger;
}
bool
IsActive () const
{
return m_active;
}
const char *
GetPrompt () const;
void
RefreshPrompt();
// If you want to read from an input reader synchronously, then just initialize the
// reader and then call WaitOnReaderIsDone, which will return when the reader is popped.
void
WaitOnReaderIsDone ();
static const char *
GranularityAsCString (lldb::InputReaderGranularity granularity);
protected:
friend class Debugger;
void
Notify (lldb::InputReaderAction notification);
Debugger &m_debugger;
Callback m_callback;
void *m_callback_baton;
std::string m_end_token;
std::string m_prompt;
lldb::InputReaderGranularity m_granularity;
bool m_done;
bool m_echo;
bool m_active;
Predicate<bool> m_reader_done;
StringList m_user_input;
bool m_save_user_input;
private:
DISALLOW_COPY_AND_ASSIGN (InputReader);
};
} // namespace lldb_private
#endif // #ifndef liblldb_InputReader_h_
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